Children watch a robot performance at the Beijing Science Center on Sept 15, 2019, as events were held across the country for the National Science Day from Sept 14-20. [Photo by Zou Hong/chinadaily.com.cn]

Children learn how to make porcelain products at the Beijing Science Center on Sept 15, 2019. [Photo by Zou Hong/chinadaily.com.cn]

Children learn robot programming at the Beijing Science Center on Sept 15, 2019. [Photo by Zou Hong/chinadaily.com.cn]

Children learn about life's mysteries at the Beijing Science Center on Sept 15, 2019. [Photo by Zou Hong/chinadaily.com.cn]